Exercise bar



FIG. 1 is a top left perspective view of an exercise bar showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is an end elevational view thereof, the end opposite being a mirror image thereof. 

The ornamental design for an exercise bar, as shown and described. 